/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Cores oficiais SESI — Manual de Marcas 2024 */
  --blue:       #164194;  /* Azul principal SESI */
  --blue-dark:  #0f2f6e;  /* Azul escuro */
  --blue-light: #e8eef8;  /* Fundo azul suave */
  --blue-mid:   #c5d3ee;  /* Borda/divisor azul */
  --green:      #52AE32;  /* Verde detalhe SESI */
  --green-bg:   #edf7e8;
  --accent:     #008BD2;  /* Azul claro SESI */
  --red:        #dc2626;
  --red-bg:     #fef2f2;
  --gray-50:    #f9fafb;
  --gray-100:   #f3f4f6;
  --gray-200:   #e5e7eb;
  --gray-400:   #9ca3af;
  --gray-600:   #4b5563;
  --gray-700:   #374151;
  --gray-900:   #111827;
  --radius:     12px;
  --shadow:     0 4px 24px rgba(22,65,148,0.10);
  --transition: 0.2s ease;
}

body {
  font-family: 'Inter', sans-serif;
  background: #f0f4f8;
  color: var(--gray-700);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Lora', serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
}

/* ============================================================
   MAIN
   ============================================================ */
.main { flex: 1; padding: 40px 0 60px; }

.hero { text-align: center; margin-bottom: 36px; }
.hero h1 {
  font-family: 'Lora', serif;
  font-size: clamp(24px, 4vw, 32px);
  color: var(--gray-900);
  margin-bottom: 10px;
}
.hero p { color: var(--gray-600); font-size: 16px; }

/* ============================================================
   STEPS BAR
   ============================================================ */
.steps-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 36px;
  flex-wrap: nowrap;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.4;
  transition: opacity var(--transition);
}
.step.active { opacity: 1; }
.step.done   { opacity: 0.7; }

.step-circle {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-600);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
  transition: background var(--transition), color var(--transition);
}
.step.active .step-circle { background: var(--blue); color: #fff; }
.step.done .step-circle   { background: var(--green); color: #fff; }

.step span { font-size: 12px; color: var(--gray-600); white-space: nowrap; }

.step-line {
  flex: 1;
  height: 2px;
  background: var(--gray-200);
  min-width: 30px;
  max-width: 80px;
  margin-bottom: 22px;
}

/* ============================================================
   CARD SECTIONS
   ============================================================ */
.card-section {
  display: none;
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  animation: fadeIn 0.3s ease;
}
.card-section.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-section h2 {
  font-family: 'Lora', serif;
  font-size: 22px;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.sub-label { color: var(--gray-600); margin-bottom: 20px; font-size: 15px; }

/* ============================================================
   PROFESSORES GRID
   ============================================================ */
.professores-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.professor-card {
  border: 2px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px 16px;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  text-align: center;
  background: #fff;
}
.professor-card:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 16px rgba(37,99,235,0.12);
  transform: translateY(-2px);
}

.professor-avatar {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--blue-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin: 0 auto 12px;
  overflow: hidden;
}
.professor-avatar img { width: 100%; height: 100%; object-fit: cover; }

.professor-card h3 { font-size: 15px; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
.professor-card p  { font-size: 13px; color: var(--gray-400); }

/* ============================================================
   SKELETON LOADING
   ============================================================ */
.skeleton-card {
  height: 140px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   HORÁRIOS
   ============================================================ */
.date-group { margin-bottom: 28px; }
.date-group h3 {
  font-size: 14px; font-weight: 600;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gray-200);
}

.horarios-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.horario-btn {
  padding: 8px 18px;
  border-radius: 8px;
  border: 2px solid var(--blue-mid);
  background: var(--blue-light);
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}
.horario-btn:hover {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.horario-btn.selected {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

.no-horarios {
  color: var(--gray-400);
  font-size: 15px;
  padding: 24px 0;
  text-align: center;
}

/* ============================================================
   FORM
   ============================================================ */
.booking-summary {
  background: var(--blue-light);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--blue-dark);
  line-height: 1.7;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: 13px; font-weight: 600; color: var(--gray-700); }

input[type="text"],
input[type="email"],
input[type="tel"] {
  padding: 10px 14px;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  font-family: 'Inter', sans-serif;
  color: var(--gray-900);
  outline: none;
  transition: border-color var(--transition);
  background: #fff;
}
input:focus { border-color: var(--blue); }
input::placeholder { color: var(--gray-400); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover  { background: var(--blue-dark); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-primary.btn-lg { width: 100%; padding: 14px; font-size: 16px; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-back {
  background: none;
  border: none;
  color: var(--blue);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  padding: 0 0 16px;
  font-family: 'Inter', sans-serif;
}
.btn-back:hover { text-decoration: underline; }

/* ============================================================
   ALERTS
   ============================================================ */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; }
.alert-error { background: var(--red-bg); color: var(--red); border: 1px solid #fecaca; }

/* ============================================================
   SUCCESS
   ============================================================ */
.success-box { text-align: center; padding: 16px 0; }
.success-icon { font-size: 56px; margin-bottom: 16px; }
.success-box h2 { font-family: 'Lora', serif; font-size: 26px; color: var(--green); margin-bottom: 10px; }
.success-box > p { color: var(--gray-600); margin-bottom: 24px; }

.success-details {
  background: var(--green-bg);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 0 auto 28px;
  max-width: 420px;
  text-align: left;
  font-size: 15px;
  color: var(--gray-700);
  line-height: 1.8;
}

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.spinner {
  width: 44px; height: 44px;
  border: 4px solid var(--blue-mid);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--gray-200);
  padding: 18px 0;
  text-align: center;
}
.site-footer p { font-size: 13px; color: var(--gray-400); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 600px) {
  .card-section { padding: 20px 16px; }
  .form-grid    { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .professores-grid { grid-template-columns: 1fr 1fr; }
  .steps-bar .step span { display: none; }
  .step-line { min-width: 20px; }
}